• GSHP is the most efficient heating technology in GHG emissions terms, in almost every province and territory.
• Environmental performance will vary from one province to the other according to the electricity production mix within each province.
• GSHP are GHG-efficient in all parts of Canada, even in areas where natural gas is the dominant source of energy for heating purposes.
• To illustrate the GHG reduction potential of GSHP, if we were to retrofit 4 % of the existing residential building stock in Canada, this would be the equivalent of reducing emissions by more than 800 megatons or removing close to 250,000 cars from our roads, .
• At this time, the CGC estimates that existing GSHP systems provide less than 0.5 % of Canada's building heating and cooling.

This table is taken from the CGC's study "Comparative Analysis of Greenhouse Gas Emissions of Various Residential Heating Systems in the Canadian Provinces."